I think I notice something weird on my last freebsd server and laptop : both have a few packages installed ; but there are very very few updates since the beginning of november and I'm a bit paranoïd, I wonder if this could be related to the security issue of nov 17th : http://www.freebsd.org/news/2012-compromise.html

But if I do portsnap fetch update and then pkg version I get that everything is up to date... moreover the version of py27-fail2ban is the same as given on freshports although nothing has been recompiled today (if I do portmaster -a it says all ports are up to date)

So, I would like to know if someone of more experience finds this weird or not...

The way I read the Nov 17th announcement is you need to do "protsnap extract" instead of "portsnap update" for a period of time.

FWIW, I checked file /usr/ports/security/py-fail2ban/distinfo and versions are:
fail2ban-fail2ban-0.8.6-0-g1efe1bc.tar.gz
which seems agrees with the WEB site in pkg-descr has. I last did a portsnap a week ago though.

Well I removed the whole /usr/ports and did portsnap fetch extract as advised by lumiwa. I don't know if this was enough, after some days, the updates began to be as frequent as before. No idea, but everything seems to be fine.